液压伺服系统实验台测试系统研制.pdf

华中科技大学硕士学位论文
摘要
本文研究及设计课题源于 20 世纪 80 年代初由华中科技大学设计、陕西秦川机
床厂制造的液压伺服实验台。该液压实验台主要功能是实现伺服阀性能实验和伺服
阀控液压缸系统性能实验。受当时技术水平的限制,实验台的测试系统是由独立仪
器(如光线示波器、频率特性分析仪 BT-6A、低频信号发生器)连接组成,因此其
工作效率低,且测试精度不高,已经不能适应现代教学和工程实训的需求。为了使
实验台起到更好的教学和工程实训作用,故对实验台的测试系统进行了重新研制。
本文的主要研究工作如下:
首先去掉原实验台的测试系统,保留其机械部分;然后在分析研究实验台的机
械液压传动结构和测试功能要求的基础上,提出了新测试系统的内容和要求。
根据实验台新测试系统的内容和要求,并结合新测试系统硬件的实现类型,分
别提出了其硬件的强电设计和弱电设计方案。强电设计的主要内容由如下单元组成:
三相异步电动机的控制、二位二通电磁阀的控制、直流稳压电源输出的实现和照明
灯的控制。弱电设计的主要内容如下:伺服放大器输出通道和各类传感器输入通道
的实现、信号调理的实现。
在完成了实验台新测试系统的硬件设计的基础上,分析和研究了实验台新测试
系统软件的功能和要求,然后运用 VC 完成了软件编写与开发。软件部分的主要内
容如下:软件面板的实现、低频信号发生器的实现、频率特性分析仪的实现、闭环
系统的实现和非线性校正的实现。

关键词:液压伺服、CAT 技术、信号调理、非线性校正
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华中科技大学硕士学位论文
Abstract
The subject researched and designed by this es from a hydraulic-servo
system test stand which was designed by huazhong University of Science and Technology
and manufactured by Qin Chuan machinery plant in the early 1980s. This test stand was
mainly for testing the performance of an electro-hydraulic servo valve and a servo
valve-control hydraulic cylinder system. Since the limit of technology level that time, the
system which performed the testing task of this test stand posed of several
independent instruments (such as a light oscillograph, a spectrum analyzer and a LF signal
generator), so not only the working efficiency but also the measuring accuracy of it was
low, which cannot fit in with the needs of modern teaching and engineering training. For
better usage in teaching and engineering training, the testing system of this test stand has
been development anew.
The main researches of this article are as follows:
Firstly the testing system of this test stand was removed, and the mechanical system
was reserved; then on the basis of analyzing and researching the demand of mechanical
hydraulic transmission system and testing function, the content and demand of the new
testing system were raised.
According to the content and demand of the new